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Evaluation of Starch Noodles Made from Three Typical Chinese Sweet-potato Starches (2002)

Chen, Z. ; Sagis, L. ; Legger, A. ; [et al.]

Oxford, UK : Blackwell Publishing Ltd

Journal of food science 67 (2002), S. 0

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ISSN: 1750-3841

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology

Notes: : The physical properties of starches from 3 typical Chinese sweet potato varieties (SuShu2, SuShu8, and XuShu18) were studied in relation to their noodle-making performance. The starch gel properties of SuShu2 differed from those of SuShu8 and XuShu18. As determined by both instrumental and sensory analysis the use of SuShu8 starch resulted in better noodle quality compared to XuShu18 and SuShu2 starches. The gel properties and noodle quality of the 3 sweet-potato starches were clearly different from those of mung-bean starch. Correlation between starch noodle quality and gel properties of the original starches was established. Keywords: sweet potato, starch, gel, noodle

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1365-2621.2002.tb09589.x

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The suitability of scanning angle reflectometry for colloidal particle sizing (1996)

van der Zeeuw, E. A. ; Sagis, L. M. C. ; Koper, G. J. M. ; [et al.]

College Park, Md. : American Institute of Physics (AIP)

The Journal of Chemical Physics 105 (1996), S. 1646-1653

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ISSN: 1089-7690

Source: AIP Digital Archive

Topics: Physics , Chemistry and Pharmacology

Notes: We investigated the suitability of reflectometry as a sizing method for polystyrene latex particles. This technique, where the particles are adsorbed at a quartz/water interface, involves the analysis of the reflection around the Brewster angle of light polarized in the plane of incidence. A computation of a full reflectivity curve containing about 20 datapoints, taking into account all electromagnetic interactions, is extremely complex and may take up to 100 h on an Indy R4600 computer (Silicon Graphics, Mountain View, CA). To use the complete electromagnetic theory for analysis of experiments therefore is impractical. We analyzed the experimental reflectivity curves using an approximate theory (free-sphere model), which neglects all electromagnetic interactions between different particles and their images in the substrate. To assess the errors introduced by neglecting these interactions, we have calculated reflectivity curves using the full electromagnetic theory for this system, and analyzed them with the free-sphere model. We found that the diameters determined with the free-sphere model deviate at most 2% from the actual values. The surface coverage determined with the free-sphere model is systematically smaller than the actual coverage. The difference can be as large as 15% at a coverage of 9%. We also show that size polydispersity of the sample plays a minor role in the analysis of the data. We illustrate the usefulness of the free-sphere model, by analyzing measurements in which polystyrene latex particles are swollen by an organic solvent that is miscible with water. © 1996 American Institute of Physics.